1. High tensile strength. Hex wrench part of tensile strength can arrive 800 M/Pa even without quenching after taking shape.

2. Bright surface, Parts are plated in chromed nickel.

3. Top hardness. material of hardness can be go to HRC55.

4. Exquisite package. for more easy to sale , the most hex key wrench 1.5mm 2mm 2.5mm will be packed in small plastic colored boxes, which marked all information for parts.

5. Long - service. Parts have good comprehensive mechanical properties after quenching.

6. Easy to replace. Hex wrench is simple design but wide use

7. Popularity. All hex key wrench 1.5mm 2mm 2.5mm have given specification such as ISO , DIN , ANSI , GB etc standards . so it can be used for different parts that have the same specification with what hex wrench has.